The 22-year-old isn't the first celeb to rock this cheesy fashion trend.

Copycat: Katy Perry was spotted working the junk food onesie after her gig last week (Photo credit: Gilbert Carrasquillo/Splash News)
Last week Teenage Dreams singer Katy Perry was spotted wearing the same onesie as she greeted fans at the top of the Philadelphia Museum of Art steps after her gig.